Fig. 4

Micronaire values and secondary cell wall thickness of mature fiber. a-c Microscopic images of cross-sections of mature fibers of the control (a), transgenic OS-6 (b), and OS-9 (c). The thickness of secondary cell wall is indicated by a red demarcation. d Micronaire values of control and transgenic mature fibers. Error bars represent the SD of three biological replicates. Statistically significant differences based on paired Student’s t-test at P < 0.01 are denoted by double asterisks